University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Green Bank Telescope Principle Scientist,
National Radio Astronomy Observatory
This talk will begin with a review of some of the recent discoveries of
the Green Bank Telescope (GBT), including work on fundamental physics, gravitational radiation, interstellar chemistry, near-Earth asteroids, star formation and the accretion disks around galaxies' nuclear black holes. Then I will discuss recent research on the existence and properties of gas that lies outside the disks of galaxies in the Local Group. This material has an unknown origin but may be intimately involved in the formation and evolution of galaxies. One object, the Smith Cloud, is in the process of merging with the Milky Way, bringing several million solar masses of gas to the inner star-forming regions of the Galaxy. It may be bringing dark matter as well. GBT observations between the galaxies M31 and M33 have revealed a population of neutral gas clouds unlike anything we have seen before. They may be the consequence of a past interaction between the two galaxies, condensations in the massive ionized halo of M31, or something else entirely.
All are welcome to attend. Join us for light refreshments at 3:30 pm in PHY 153.
The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Indigenous Initiatives Office.